If you see nothing at all on the serial monitor, then either the GPS is not transmitting characters (which is unlikely unless it is defective or powered incorrectly), or you have the wrong wire from the GPS attached to RX of the Arduino.
If you see nothing at all on the serial monitor, then either the GPS is not transmitting characters (which is unlikely unless it is defective or powered incorrectly), or you have the wrong wire from the GPS attached to RX of the Arduino.